/Engine/Source/Runtime/Core/Public/Misc/CommandLine.h
Returns true if Outline was large enough to hold the filtered string, Otherwise returns false.
static bool FilterCLIUsingGrammarBasedParser ( TCHAR * OutLine, int32 MaxLen, const TCHAR * InLine, const [TArrayView](API\Runtime\Core\Containers\TArrayView)< [FString](API\Runtime\Core\Containers\FString) > & AllowedList )